well this thread is probably dead but i think i have figured out that problem.
It has to do with speech recognition. Most likely the microphone is set to wave or 'what you hear' rather than a mic input. So it tries to type in whatever it thinks it hears through the sounds on the computer (ie. music or other sounds being played in the background even messenger sounds)
I had this problem till i set my voice recognition to use my microphone input and had my microphone disabled. If you use your microphone and have another input you dont use, like a line in or a 'second cd audio' sometimes referred to as digital cd, you could select that.
The settings are in control panel under speech.. then click on Audio Input ... select Properties... choose "Use this audio input line" and select microphone or one of those unused inputs i mentioned earlier.. click ok on all other screens and it should solve the problem.
I have tried to contact the writer of the script to see if i could get it without the speech recognition feature just the TTS features but he hasn't responded.
So if anyone reads this that knows how to edit his script for all of us ... please do